Welcome to Remoting. anonymous wrote : | I wish to determinate if the problem ocurred: | when the call was going to the server. | when the request was being processed in the server. | when the call was returning to the client. | You want to look at the particular Throwable that comes back, its type and its description. If a problem occurs in transit, you might get an IOException. If the server side handler throws an exception, that exception will be transported across the network and re-thrown by Remoting on the server side. anonymous wrote : For a remote callback you use the handleCallback() method in the InvokerCallbackHandler implementation. This method throws a CallbackHandleException. | Throwables generated during callback handling are wrapped in a CallbackHandleException. You want to extract the Throwable embedded in the CallbackHandleException and apply my previous remarks. By the way, when I get an exception I don't recognize I often just google it and get lots of useful information. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4016894#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...